I revived the white noise sound machine in a very timely manner and we couldn’t wait to use it. Thankfully it arrived before my 2 year old twins took a nap. We opened the box and we were excited that it came with the option of batteries or a plug. The place we wanted to use it was in between two bedroom doors so having the option was great choice for us. The twins don’t know it but they love it. They got more rest time and were not so cranky. I love that I can set a timer so it turns off but we loved it so much it runs all night! [This review was collected as part of a promotion.]